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Engine control apparatus

A technology for controlling equipment and engines, which is applied in the direction of engine control, mechanical equipment, engine components, etc., and can solve the problems of reduced effects, times of automatic engine shutdown and restart, and reduced length of time for engine automatic shutdown and restart.

Active Publication Date: 2013-09-18
DENSO CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in this case, the number of automatic engine stops and restarts and the length of time the engine is automatically stopped and restarted will be reduced
As a result, the beneficial effect that can be achieved with the idle stop function of the engine control device will be reduced

Method used

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  • Engine control apparatus
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Experimental program
Comparison scheme
Effect test

no. 1 approach

[0023] figure 1 An overall structure of an automotive engine system including an electronic control unit (ECU) 20 according to the first embodiment is shown. The ECU 20 is provided to execute various controls for the engine 10 of the automobile engine system, such as fuel injection amount control, ignition timing control, and idle stop control. Engine 10 may be, for example, a four-cylinder internal combustion engine of a motor vehicle.

[0024] Such as figure 1 As shown, the automobile engine system additionally includes at least one fuel injector 11, an igniter 12, a starter 15, a battery (in figure 1 Indicated by VB) 17 and the switch circuit (in figure 1 Indicated by SW) 18. The fuel injector 11 is configured to inject fuel into the engine 10 . The igniter 12 is configured to generate ignition sparks at spark plugs respectively provided in cylinders of the engine 10 , thereby igniting an air-fuel mixture in the cylinders. In addition, although not in figure 1 As sho...

no. 2 approach

[0077] In the foregoing embodiment, the starter deterioration related value SDRV is set to 1, and the accumulated value AV represents the accumulated number of times the engine 10 is started or restarted by the starter 15 .

[0078] In contrast, in the present embodiment, the starter deterioration related value SDRV is calculated as the starter load (ie, the load applied to the starter 15 ) every time the starter 15 is driven to start or restart the engine 10 ; Therefore, the accumulated value AV represents the accumulated starter load (ie, the accumulated load applied to the starter 15 to start or restart the engine 10 ).

[0079] More specifically, the starter load increases with the starter driving time (ie, the length of time during which the starter 15 is driven to crank the engine 10 ). In addition, the starter load also increases as the temperature of the cooling water of the engine 10 decreases. Therefore, in the present embodiment, calculator 20a of ECU 20 first dete...

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Abstract

An engine control apparatus is provided for controlling an engine of a motor vehicle. The engine control apparatus is configured to automatically stop the engine by stopping combustion in the engine when a predetermined automatic stop condition is satisfied and restart the engine by driving a starter when a predetermined restart condition is satisfied. The engine control apparatus includes a calculator and a condition changer. The calculator calculates an accumulated value by accumulating a starter deterioration-related value each time the engine is started or restarted by the starter; the accumulated value is indicative of the degree of deterioration of the starter. The condition changer changes, when the accumulated value has increased to reach a threshold value, the predetermined automatic stop condition so as to lower the frequency of the engine being automatically stopped and restarted and thereby suppress deterioration of the starter.

Description

technical field [0001] The present invention relates to an engine control device. Background technique [0002] There are known engine control devices with a so-called idle stop function. More specifically, these engine control devices are configured to detect a manipulation for stopping or starting a motor vehicle, such as manipulation of the accelerator or manipulation of the brakes by the driver of the vehicle, and cause the engine of the vehicle to automatically Stop and restart. With the idle stop function, advantageous effects such as reduction of fuel consumption of the engine can be achieved. [0003] On the other hand, for a motor vehicle equipped with an engine control apparatus having an idling stop function, the engine of the vehicle is automatically stopped and restarted repeatedly. As a result, the number of times the starter of the vehicle is driven to start or restart the engine is significantly increased compared to a motor vehicle equipped with an engine...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02D29/02F02N11/10
CPCF02N11/0818F02N11/0833F02N2200/023F02N2200/14Y02T10/40F02D41/042
Inventor 森田哲生
Owner DENSO CORP